Hood for automobile engines



NOV. 17, 1931. c, LARSEN 1,831,811

HOOD FOR AUTOMOBILE ENGINES Filed Aug. 9, 1928 Patented Nov. 17, 1931 UNITED STATES CARL A. LARSEN, OF OAK PARK, ILLINOIS v noon FOE AUTOMOBILE Enemies Application filed August 9, 192 8. SerialNo. 298,464.

My invention relates to the hoods of automobile engines, and the object thereof is to provide means for controlling the currents of air through the hood so as to aid in the Eproper establishment of heat control at different seasons of the'year for the comfort of the passengers and for'efliciency in operation.

The principles of my invention are illustrated in the drawings, in which Figure 1 represents the hood of a motor car in longitudinal section, looked at inwardly from the right side of the car and exhibiting my device as applied to the inner left-hand side;

Fig. 2 represents a section onthe dotted line 22 of Fig. 1;

Fig. 3 represents an enlarged face view of a portion of Fig. 1; and

Fig. 4 represents a section on the dotted line H of Fig. 1.

Further describing my invention with reference to the drawings in which like-characters of reference denote like parts throughout Numeral 1 represents the main body portion of an automobile, 2 represents the hood in central longitudinal section, and 3 is the radiator thereof, while 4 is the upper part and 5 is the far side of an automobile hood looked at from the inside. NumeralsG, 6 represent the wings of a centrally disposed cooling fan 7 adapted to impel its own selfcreated air currents, as well as those relatively created by the moving vehicle, and passing through the radiator 3, over the motor throughout the hood. In the side Wall 5 are a number of openings 8 formed by cutting through the material of the side wall on one edge and leaving pushed out portions 9, whereby a partially protected air opening is provided at the rear thereof creating a partial suction which aids in cooling the engine and scavenging the heated and foul air within the hood.

The vertical openings, indicated in Fig. 4, extending practically transversely up and down across a considerable portion of the metal sheet from which the sides of the hood bolts or rivets 11.

are formed, are provided with adjustable shutters adapted to close thereover or alternately adapted to be opened or closed with reference thereto, as desired. A multiplicity of such shutters is provided and designated by the letters a to h, inclusive. These shut- 65 ters may be mounted directly on' the side walls of the hood, or I may provide a rectangular frame-work 10 as a mounting for the'said shutters which may be secured to the inner side walls of the hood by means of A suitable structure for the said rectangular frame-work may consist of the angle bars having body portion 12 andrectangular flanges 13, which are secured to the upper portion of the side wall 5, while similar bars 12 and 13' in inverse position may become the lower portion of the frame-work. It will be seen that the horizontal longitudinal bars of the framework will act as supports for the hinged shutters while they are connected into a rigid structure by means of the vertical end bars 14. v

Betweenthe upper and lower ends of the shutters and the corresponding upper and lower flanges are mounted washers 18 and springs 19 held therebetween, thereby forming an elastic and noiseless fastening. In order that the shutters thus mounted, may have uniform control for fastening in the final operative position, as desired, I provide draw rod 20 having properly spaced openings to fit over-and receive the offset cranks 17 on the rods 15. An offset flange 21 is provided on the element 10 on which the extended portion 20 of the draw rod rests. Such extension 20 and the flange 21 are provided With corresponding'openings so that, when the shutters are placed in proper desired position, they may beheld rigidly therein by means of a cotter pin 22 or similar device.v

It should be observed that the apparatus above described is adapted to be used differentlyin diflerent conditions of the atmosphere. When the car is "being operated in )5 high summer: heat, theair which is forced through the radiator by the movement of the car and assisted backward by the movement of the-fan isforced past the hot motor and then against the dash and floor-boards of the In cool weather or in winter, the shutters will be tightly closed so that a large amount of the hot air will be retained, little thereof escaping through the sides, while practicallyno cold air is admitted from the outside to interfere with the correcttemperatu-re of the motor. 1

The air coming through the radiator and forced back by the fan past the motor and against the dash and floor-boards creates a temperature which will be comfortable for the passengers when the weather is cold.

Having thus described my invention, and the application thereof so that itcan be constructed and applied by those skilled in the art, I claim.:-

1. In an engine having an enclosing hood with external openings, integrally formed air deflectors opening backwardly from the hood, shutters hinged inside the hood and opening forwardly to receive air currents from the radiator and deflect them through said external air openings,

2. In an engine having, an enclosing hood with external openings, air defiators integrally formed with said hood opening backwardly therefrom, shutters hinged inside the hoodv and adapted alternately to close said external openings or to open them so as to receive air currents and deflect them outwardly through said external. airopenings said shutters having a. longitudinal edge thereof pivotally' secured to the rear side of. said external openings. V

3. In. a motor hood having external air'openings in the sides thereof adapted to normally discharge air currents backwardly from a moving car, shutters pivotaslly secured to the sides of the hood on the inside thereof whereby the pivot points of each of the shutters may be placed in close relationto the rear edge of the external air openings, means for alternately so placing said shutters as to impede the air flow from the external openings or to receive heated air currents from the fan and direct them through the external air openings, and means for'causingpartial rotation of the shutters whereby the same may be presented in the direction in whiclrthe' vehicle is travelling.

4. In an automobile hood having external air discharge openings on the sides thereof, a plurality of flanges inside the hood extending above and below the said air discharge openings substantially parallel to each other, crank rods ournalled in each of the equally spaced parallel openings in the inset flanges, shutters having one of their longitudinal edges rigidly secured to the crank rods, whereby the shutters may extend. in the direction of the cooling fan and in the direction of travel of the motor vehicle, a pull bar having equally spaced openings in which the said cranks are received, and means for locking the pull bar to hold the shutters in any desired adjusted position relatively to the air discharge openings.

5. In an automobile hood having a multiplicity of air discharge openings on the sides thereof, louvres mounted over the openings extending in the direction of the stream line of the motor vehicle, whereby air may be caused to be drawn through the louvres upon movement of the vehicle, a multiplicity of shutters pivotally attached to the inside. of the hood adjacent to the air discharge openings, said shutters having a longitudinal edge pivotally secured to the side of the hood ad- 'j-acent tothe louvres, means for causing partial rotation of the shutters whereby the shut ters may be caused to extend in the direction of the cooling fan of the automobile or in parallel relation with the side of the automobile hood, and means for holding the shutters in an adjusted position.

6, A motor hood having'a series of vertical slits along the sides thereof and a series of adjustable shutters arranged behind said slits, said shutters being pivotally supported atone edge, and a bar attached to each of the shutters on a given side of the hood, sald shutters adapted to be opened and closed by the 7 movement of said bar.

7. A motor hood having a series of vertical slits along the sides thereof, an outwardly and backwardly extending air deflector on the front side of each: slit, shutters mounted behind said vertical slits and pivotally attachedto the hood by therear vertical edges of said shutters, and a bar on each side of the hood attached to all shutters on that side whereby the shutters on either side of the hood may be opened or closed independently of those on the other side. 7 Inwitness whereof, I havehereunto set my hand at Chicago, Illinois, this 3rd day of August, 19-28.

CARL A. LARSEN. 

